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<h2><a name="SECTION0022140000000000000000"></a><a name="tkinter-basic-mapping"></a>
<br>
20.1.4 Mapping Basic Tk into Tkinter
            
</h2>

<p>
Class commands in Tk correspond to class constructors in Tkinter.

<p>
<div class="verbatim"><pre>
    button .fred                =====&gt;  fred = Button()
</pre></div>

<p>
The master of an object is implicit in the new name given to it at
creation time.  In Tkinter, masters are specified explicitly.

<p>
<div class="verbatim"><pre>
    button .panel.fred          =====&gt;  fred = Button(panel)
</pre></div>

<p>
The configuration options in Tk are given in lists of hyphened tags
followed by values.  In Tkinter, options are specified as
keyword-arguments in the instance constructor, and keyword-args for
configure calls or as instance indices, in dictionary style, for
established instances.  See section&nbsp;<a href="tkinter-setting-options.html#tkinter-setting-options">20.1.6</a> on
setting options.

<p>
<div class="verbatim"><pre>
    button .fred -fg red        =====&gt;  fred = Button(panel, fg = "red")
    .fred configure -fg red     =====&gt;  fred["fg"] = red
                                OR ==&gt;  fred.config(fg = "red")
</pre></div>

<p>
In Tk, to perform an action on a widget, use the widget name as a
command, and follow it with an action name, possibly with arguments
(options).  In Tkinter, you call methods on the class instance to
invoke actions on the widget.  The actions (methods) that a given
widget can perform are listed in the Tkinter.py module.

<p>
<div class="verbatim"><pre>
    .fred invoke                =====&gt;  fred.invoke()
</pre></div>

<p>
To give a widget to the packer (geometry manager), you call pack with
optional arguments.  In Tkinter, the Pack class holds all this
functionality, and the various forms of the pack command are
implemented as methods.  All widgets in <tt class="module"><a href="module-Tkinter.html">Tkinter</a></tt> are
subclassed from the Packer, and so inherit all the packing
methods. See the <tt class="module"><a href="module-Tix.html">Tix</a></tt> module documentation for additional
information on the Form geometry manager.

<p>
<div class="verbatim"><pre>
    pack .fred -side left       =====&gt;  fred.pack(side = "left")
</pre></div>

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